Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, China.
Institute of BioPharmaceutical Research, Liaocheng University, Liaocheng 252059, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2022 Nov 5;280:121541. doi: 10.1016/j.saa.2022.121541. Epub 2022 Jun 20.
A novel ultra-small hydrazone-linked covalent organic polymer (UHCOP) was synthesized based on the Schiff-base reaction between 2,4,6-trihydroxy-1,3,5-benzenetricarbaldehyde and 1,4-benzenedicarbohydrazide at room temperature and utilized as a sensitive fluorescent sensor for rapid (<2 min) and selective detection of Fe in aqueous solution. The prepared UHCOP displayed ultra-small size with the diameter of 7.98 ± 0.97 nm and gave a stable fluorescent emission at 510 nm. UHCOP exhibited good sensitivity and highly selectivity towards Fe. The coordination interaction between UHCOP and Fe resulted in the obviously aggregation-caused quenching response of UHCOP. The linear range was from 5.0 μM to 1.4 mM (R = 0.999) with the detection limit of 2.5 μM. Finally, UHCOP has been successfully applied in the detection of Fe in real water samples, proving the fabricated UHCOP is promising as a sensitive fluorescent sensor for selective detection of Fe in aqueous solution.
一种新型的超小腙键合共价有机聚合物（UHCOP）是基于 2,4,6-三羟基-1,3,5-苯三甲醛和 1,4-苯二甲酰肼之间的希夫碱反应在室温下合成的，并用作快速（<2 分钟）和选择性检测水溶液中 Fe 的灵敏荧光传感器。所制备的 UHCOP 具有超小的尺寸，直径为 7.98±0.97nm，并在 510nm 处给出稳定的荧光发射。UHCOP 对 Fe 表现出良好的灵敏度和高度选择性。UHCOP 与 Fe 之间的配位相互作用导致 UHCOP 的明显聚集猝灭响应。线性范围为 5.0μM 至 1.4mM（R=0.999），检测限为 2.5μM。最后，UHCOP 已成功应用于实际水样中 Fe 的检测，证明所制备的 UHCOP 有望成为水溶液中 Fe 选择性检测的灵敏荧光传感器。
